[easy] remove stale comment
[easy] remove stale comment

Summary: I believe this was referring to some now-removed code that wrote to the type table, the remaining code is just returning the result.

Reviewed By: panagosg7

Differential Revision: D16790549

fbshipit-source-id: 23c7bc1f909aae2eb2c59c6972ca1616ed132f3a

facebook/flow,gabelevi/flow,gabelevi/flow,mroch/flow,facebook/flow,mroch/flow,samwgoldman/flow,gabelevi/flow,gabelevi/flow,facebook/flow,mroch/flow,facebook/flow,samwgoldman/flow,mroch/flow,gabelevi/flow,samwgoldman/flow,mroch/flow,mroch/flow,gabelevi/flow,facebook/flow,facebook/flow,samwgoldman/flow,samwgoldman/flow,gabelevi/flow,samwgoldman/flow,facebook/flow,samwgoldman/flow,mroch/flow